Lead Contamination and Source Characterization in Soils Around a Lead–Zinc Smelting Plant in a Near-Urban Environment in Baoji, China

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• 作者：Wenbo Deng ; Xuxiang Li ; Zhisheng An…
• 刊名：Archives of Environmental Contamination and Toxicology
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：71
• 期：4
• 页码：500-508
• 全文大小：1,500 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Terrestrial Pollution
  Agriculture
  Ecology
  Forestry
  Environment
  Soil Science and Conservation
  
• 出版者：Springer New York
• ISSN：1432-0703
• 卷排序：71

文摘

Economic reforms in China since 1978 have promoted nationwide socioeconomic advancement but led to a considerable amount of environmental pollution. The distribution and sources of Pb in a typical peri-urban industrial part of Baoji, China, were assessed by determining the Pb contents and isotopic compositions in 52 topsoil samples from the study area. The topsoil samples were polluted averagely with 40.88 mg Pb kg−1, was 1.86 times higher than the Pb content of local background soil (22.04 mg kg−1). Pb isotopic compositions were determined by analyzing samples prepared using total digestion and acid extraction methods. Radiogenic isotopes contributed more to the Pb concentrations in the acid extracts than in the total digests. This was shown by the 207/206Pb and 208/206Pb ratios, which were 0.845–0.88 and 2.088–2.128, respectively, in the acid extracts and 0.841–0.875 and 2.086–2.125, respectively, in the total digests. This indicates that anthropogenic sources of Pb could be identified more sensitively in acid extracts than in total digests. The Pb isotope ratios showed that burning coal and smelting ore are the predominant anthropogenic sources of Pb in the study area, i.e., a lead–zinc smelter and a coking plant are major sources of Pb in the study area.